### Hypertext Help with LaTeX

# \boldmath

The `\boldmath` declaration switches
to a bold math italic font; this causes letters, numbers, and
**most** symbols used in math mode to be set in a bold type.
(In LaTeX2e **everything** in the
formula is set in a bold font.)

The `\unboldmath` declaration switches
back to the normal math italic font.

Note, these commands should **not** be used in math mode.
Thus the scope of the declaration must
include the math mode expressions to which you want it to apply.

If you
want only part of a formula to be bold an
`\mbox` command is useful:

`\( Regular formula +
\mbox{\boldmath$ Bold part$} = 0 \)`

Both `\boldmath` and `\unboldmath` commands are
fragile.

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Revised: Sheldon Green, 7 Jul 1995.